Haven't been able to confirm in Chambers, but could laid on (attacked with vigour) be extended to meaning quarrelled?
So, not very hopeful suggestion for 4 is Loch Laidon.
Last attempt.
There is a loch called An Add, again a stretch, this time for 2.
BTW, there is no Loch of the Lues, as my earlier post - I was thinking of Loch of the Lowes at St Mary's Loch in the Borders, an area I've lately become more familiar with.